Breakeven ROAS is the minimum Return on Ad Spend needed to avoid losing money. Spend a dollar on ads, generate exactly enough revenue to cover that dollar and your cost of goods. Net profit: zero.
The breakeven ROAS formula
Breakeven ROAS = 1 ÷ Gross Margin %
Where gross margin = (Revenue − COGS) ÷ Revenue
This works because: - Revenue from ads = ROAS × ad spend - Gross profit = Revenue × gross margin % - At breakeven: gross profit = ad spend - ROAS × ad spend × gross margin = ad spend - ROAS = 1 ÷ gross margin
Worked examples
E-commerce: 40% gross margin Breakeven ROAS = 1 ÷ 0.40 = 2.5×
If you spend $1,000 on ads and generate $2,500 in revenue: $2,500 × 40% = $1,000 gross profit. Ads cost $1,000. Net: zero. You need above 2.5× to profit.
SaaS: 75% gross margin Breakeven ROAS = 1 ÷ 0.75 = 1.33×
SaaS businesses can profit from much lower ROAS because most of each dollar of revenue is gross profit. Even a 2× ROAS is highly profitable at 75% margin.
Dropshipping: 20% gross margin Breakeven ROAS = 1 ÷ 0.20 = 5.0×
Low-margin businesses need very high ROAS to profit. Google and Meta both push costs up over time — if you can't sustain 5×+ ROAS, low-margin advertising isn't viable.
Quick reference table
| Gross Margin | Breakeven ROAS | Profitable at 4× ROAS? |
|---|---|---|
| 15% | 6.67× | No (-33% ROI) |
| 25% | 4.0× | No (0% — breakeven) |
| 35% | 2.86× | Yes (40% ROI) |
| 50% | 2.0× | Yes (100% ROI) |
| 70% | 1.43× | Yes (180% ROI) |
Breakeven ROAS for lifetime value models
For subscription businesses, use gross LTV instead of single-order revenue:
LTV-based breakeven ROAS = LTV × Gross Margin % ÷ CAC
This is why SaaS companies can justify acquiring customers at a loss (ROAS < breakeven) if LTV is high enough — the payback happens over months of subscription.
Use the Ad ROAS Calculator to compute your breakeven ROAS and see whether your current campaigns are profitable at your gross margin.